DAB mandated the use of MP2, which pre-dated MP3. DAB+ uses MP4 aacPlus(HE-AAC v2). Unfortunately this doesn't improve sound quality because stations use the e

DAB mandated the use of MP2, which pre-dated MP3. DAB+ uses MP4 aacPlus(HE-AAC v2). Unfortunately this doesn't improve sound quality because stations use the extra efficiency to switch to lower bit-rates. Some countries have stations at 48kbps. The UK is leading the drive to lower sound quality with DAB+ stations on the SDL multiplex at 32kbps. Note that DAB+ also hides a cost increase because stations have to pay Fraunhofer for its patents. Fun, isn't it? ;-)